User Equipment Device for a Umts Mobile Telephone Communications System

1. A user equipment device of a mobile radio telecommunications system, said user equipment device working selectively in two modes of operation, a connected mode in which resources of the system are allocated to setting up a connection with the user equipment device and an idle mode, said user equipment device being identified in idle mode by a first identity and in connected mode by a second identity, wherein the user equipment device in connected mode processes messages in which said user equipment device is identified by said first identity.

2. The user equipment device according to claim 1 , wherein said first identity of the user equipment is an international mobile subscriber identity or a temporary mobile subscriber identity for a circuit switch service or a packet temporary mobile subscriber identity.

3. The user equipment device according to claim 1 , wherein said second identity is a UTRAN network temporary identity.

4. The user equipment device according to claim 1 , wherein said first identity of the user equipment is an identity applicable in any type of public land mobile network.

5. The user equipment device according to claim 1 , wherein said first identity of the user equipment is an identity applicable in a GSM-MAP or DS-41 public land mobile network.